The Airline Industry Defines "No-Shows" as Passengers Who Have Purchased

question 117

Multiple Choice

The airline industry defines "no-shows" as passengers who have purchased a ticket but fail to arrive at the gate on time for departure.United Airlines operates many flights from Philadelphia to Dallas.The table below represents the observed number of no-shows that occurred on a random sample of 120 flights between Philadelphia and Dallas this year,and experienced the no-show proportions last year. United Airlines would like to know if the proportions of no-shows has changed between last year and this year on flights between these two cities using α = 0.05.The expected frequency of five no-shows for this sample is ______.

• A) 9
• B) 12
• C) 14
• D) 19

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Definitions:

Positive Skew

A distribution shape where most values are clustered towards the left, with a long tail to the right.

Median

A statistical measure representing the middle value in a data set, where half the numbers are above and half are below.

Absolute Zero

The lowest possible temperature where nothing could be colder and no heat energy remains in a substance, equivalent to -273.15°C or 0 Kelvin.

Nominal Data

A type of data that categorizes variables without a natural order or ranking among the categories.